Hello. My recent project is a 72 Chevy C10 LWB 2 wheel drive. I pulled the mostly disconnected 350 out in favor of a 75 4 bolt 454. I got the motor and trans all bolted in and most electrical hooked up then proceeded to install my passenger side header from Summit and then moved on to my driver side which of course wouldn't fit because it hits the frame part of the motor mount. After doing some research it appears I need to have the big block style motor and frame mount for these headers to work. Does anyone have a different idea that has worked for them? or does anyone have a motor mount setup for a big block 72 for sale? My project is basically at a stand still so any friendly advice would be appreciated...Thanks very much.